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The National Institute of Standards and Technology (NIST) generates and maintains thousands of Standard Reference Materials (SRMs) to serve commerce worldwide. Many SRMs contain metrologically traceable mass fractions of known organic chemicals and are commercially available to aid the analytical chemistry community. One such material, NIST SRM 1957 Organic Contaminants in Non-Fortified Human Serum, was one of the first materials issued by NIST with measurements for per- and polyfluoroalkyl substances (PFAS) listed on the Certificate of Analysis and was commercially available in 2009. Since the release of SRM 1957, nearly 400 units have been sold to date, and over 50 publications related to PFAS measurements have included this material for multiple analytical purposes, such as a quality control material, for interlaboratory comparison, as an in-house comparison tool, for inter- and intra-day measurement accuracy, as an indicator of isomeric patterns of PFAS, and for other uses. This perspective details the ways SRM 1957 is utilized by the analytical community and how data have been reported in the literature. A discussion on accurately comparing SRM data to generated data is included. Furthermore, we conducted an in-depth investigation around additional applications for NIST SRMs, such as a matrix-matched reference material, and for the identification of targeted compounds during high-resolution mass spectrometry data collection. Ultimately, this manuscript illustratively describes the ways to utilize a NIST SRMs for chemicals of emerging concern.<br />Regular self-examination can facilitate early detection of testicular cancer and malignancies of the breast and may ensure acurative treatment. In this analysis we explored the tendencies of medical students to perform self-examination and associated factors.<br />As part of their urology rotation, medical students of the Technical University of Munich were surveyed via questionnaires regarding their health and sexual behavior. In all, 98.8% of the students participated and data from 473 of 477 students were included in this analysis. [https://www.selleckchem.com/products/SB-203580.html selleck] Data were analyzed using univariate and multivariate regression analysis.<br />In all, 64.2% (n = 177) of the male students and 72.3% (n = 296) of the female students performed regular self-examination of the testis and breast, respectively. Students who did not communicate with their partners or friends about their sex lives were less likely to preform regular self-examination (p &lt; 0.05). Male students without sexual intercourse in the 4weeks prior to the survey and female studeand young adults. A distressed sex life might hinder young adults in preforming regular self-examination. Therefore, improved education about the significance of testicular cancer and routine urological consultations for male teenagers and young men are ways to promote testicular self-examination within this age group.Many neuroimmunological diseases, such as encephalopathy, encephalitis, myelitis and acute disseminated encephalomyelitis (ADEM) have occurred more frequently after infections with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), which indicates a parainfectious or postinfectious association. The most likely underlying mechanisms include virus-triggered overactivation of the immune system with hyperinflammation and cytokine storm but potentially also the development of specific autoantibodies against central nervous system (CNS) tissue. These were predominantly detected in the cerebrospinal fluid of severely ill coronavirus disease 2019 (COVID-19) patients. In contrast, direct damage after invasion of SARS-CoV‑2 into the brain and spinal cord does not seem to play a relevant role. Susceptibility to infection with SARS-CoV‑2 in patients with multiple sclerosis, myasthenia or other neuroimmunological diseases including the risk for severe disease courses, is not determined by the administered immunotherapy but by known risk factors, such as age, comorbidities and the disease-related degree of disability. Therefore, immunotherapy in these patients should not be delayed or discontinued. The contribution of neuroimmunological mechanisms to long-term sequelae after survival of a COVID-19 illness, such as fatigue, impairment of memory, sleep dysfunction or anxiety, will require long-term clinical follow-up, preferentially in COVID-19 register studies.<br />In this phase I study, we evaluated the safety, biodistribution and dosimetry of [<br />Zr]Zr-DFO-girentuximab (<br />Zr-girentuximab) PET/CT imaging in patients with suspicion of clear cell renal cell carcinoma (ccRCC).<br />Ten eligible patients received an intravenous administration of 37MBq (± 10%) of<br />Zr-girentuximab at mass doses of 5mg or 10mg. Safety was evaluated according to the NCI CTCAE (version 4.03). Biodistribution and normal organ dosimetry was performed based on PET/CT images acquired at 0.5, 4, 24, 72 and 168h post-administration. Additionally, tumour dosimetry was performed in patients with confirmed ccRCC and visible tumour uptake on PET/CT imaging.<br />Zr-girentuximab was administered in ten patients as per protocol. No treatment-related adverse events ≥ grade 3 were reported.<br />Zr-girentuximab imaging allowed successful differentiation between ccRCC and non-ccRCC lesions in all patients, as confirmed with histological data. Dosimetry analysis using OLINDA/EXM 2.1 showed that the organs receiving the highest doses (mean ± SD) were the liver (1.86 ± 0.40mGy/MBq), the kidneys (1.50 ± 0.22mGy/MBq) and the heart wall (1.45 ± 0.19mGy/MBq), with a mean whole body effective dose of 0.57 ± 0.08mSv/MBq. Tumour dosimetry was performed in the 6 patients with histologically confirmed ccRCC resulting in a median tumour-absorbed dose of 4.03mGy/MBq (range 1.90-11.6mGy/MBq).<br />This study demonstrates that<br />Zr-girentuximab is safe and well tolerated for the administered activities and mass doses and allows quantitative assessment of<br />Zr-girentuximab PET/CT imaging in patients with suspicion of ccRCC.<br />NCT03556046-14th of June, 2018.<br />NCT03556046-14th of June, 2018.In order to support dermatologists' interest for the fascinating area of neonatal dermatology, we provide (1) an introduction to the specifics of skin barrier in premature and full-term neonates as well as their clinical implications and (2) an example of age-dependent differential diagnoses and approach to a facial vascular stain in a neonate.