Evidence-Based medicine in obstetrics: can level B and C recommendations be elevated tolevel A recommendatons?
Chauhan SP, Chang E, Brost B, Assel B, Baxter J, Smith JA, Grobman R, Berghella V, Scardo J, Magann E, Morrison JC. Evidence-Based medicine in obstetrics: can level B and C recommendations be elevated tolevel A recommendatons?. OB Med. 2009; 2:63-66.