Effect of vitamin D in addition to letrozole on the ovulation rate of women with polycystic ovary syndrome: protocol of a multicentre randomised double-blind controlled trial.
Jennifer K Y KoSofie S F YungShui Fan LaiRebecca S F WanCatherine K Y WongKeedon WongChing-Lung CheungErnest Hung Yu NgHang Wun Raymond LiPublished in: BMJ open (2024)
NCT04650880.