海量图书期刊资源，随时随地畅享阅读乐趣
Shoulder dystocia and brachial plexus injury: a case-control studyChristoffersson, Magnus; Kannisto, Paivi; Rydhstroem, Hakan; Stale, Håkan; Walles, Bengt · Acta Obstetricia et Gynecologica Scandinavica · 2003