Association between COVID-19 vaccination and hair cortisol concentrations.
BACKGROUND: Cortisol is a steroid hormone secreted mainly by the adrenal cortex and is associated with chronic stress levels in the body. .....
Notice: session_start(): ps_files_cleanup_dir: opendir(/var/lib/php/sessions) failed: Permission denied (13) in /data/www/nel.edu/www/index.php on line 14