Validation of a clinical risk scoring system, based solely on clinical presentation, for the management of pregnancy of unknown location.
Barnhart KT, Sammel MD, Takacs P, Chung K, Morse CB, O'Flynn O'Brien K, Allen-Taylor L, Shaunik A. Validation of a clinical risk scoring system, based solely on clinical presentation, for the management of pregnancy of unknown location. Fertil Steril. 2013 Jan; 99(1):193-198.