![](http://www.alamy.com/thumbs/6/356D63F2-7DB6-4670-8192-7B0B16720106/CBDMT2.jpg)
samples of saliva in plastic tubes collected at different time of day for laboratory hormone profile analysis
samples of saliva in plastic tubes collected at different time of day for laboratory hormone profile analysis
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Photo credit: © Marek Uliasz / Alamy / Afripics
License: Royalty Free
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Keywords: analysis, collection, date, health, hormone, label, laboratory, medical, saliva, sample, test, testosterone, time, tube