海量图书期刊资源，随时随地畅享阅读乐趣
Evaluating the efficacy of ultrasound-indicated Shirodkar cerclage in twin gestationsA.S. Roman; A. Rebarber; A.K. Sfakianaki; J. Mulholland; M. Paidas; D. Saltzman; D. Roshanfekr; A. Monteagudo · 2003