Friedland G W, de Vries P
Urology. 1975 May;5(5):698-706. doi: 10.1016/0090-4295(75)90137-5.
To determine when horseshoe kidneys and crossed fused ectopic kidneys might develop, the authors studied the Carnegie collection of human embryos. They found that renal fusion must occur before the kidneys ascend between the umbilical arteries.
为了确定马蹄肾和交叉融合异位肾可能在何时发育，作者研究了卡内基人类胚胎标本集。他们发现，肾融合必须在肾脏在脐动脉之间上升之前发生。
