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. 2019 Aug 27;9:12397. doi: 10.1038/s41598-019-48441-5

Figure 1.

Figure 1

Crossover study design. Men enter the study having taken a mesalamine medication coated with (+) or without (−) DBP for at least 3 months. Semen, blood, and urine were collected twice (green star) at baseline, after 4 months on an alternate drug (crossover), and after a final 4 months on the original drug (crossback).