Lopez LR, Barlogio CJ, Broberg CA, Wang J, Arthur JC. A nadA mutation confers nicotinic acid auxotrophy in pro-carcinogenic intestinal escherichia coli NC101. Front Microbiol. 2021 Jun 2;12:670005. doi: 10.3389/fmicb.2021.670005
Johannes CB, Crawford SL. Menstrual bleeding, hormones, and the menopausal transition. Semin Reprod Endocrinol. 1999 Jan 1;17(4):299-309.