Basnayake S, de Silva S V, Miller P C, Rogers S
Contraception. 1983 May;27(5):465-72. doi: 10.1016/0010-7824(83)90043-4.
A 4-cell randomized, blind clinical trial was conducted at three sites in Sri Lanka to evaluate the impact of daily vitamin supplements in preventing oral contraceptive side effects and in improving continuation. No significant effects were found.
在斯里兰卡的三个地点进行了一项4组随机双盲临床试验,以评估每日补充维生素在预防口服避孕药副作用和提高续用率方面的影响。未发现显著效果。