海量图书期刊资源,随时随地畅享阅读乐趣
Racial differences in predictive value of the lecithin/sphingomyelin ratioRichardson, Douglas K.; Torday, John S. · American Journal of Obstetrics and Gynecology · 1994
Racial Differences in the Predictive Value of Mallampati Score for Obstructive Sleep ApneaAlbustami, Omar; Islam, Md.; Rahman, Khawaja; Sharma, Sunil · Chest · 2011