Contributions to gynecology and obstetrics ; Ultrasound in gynecology and obstetrics / Contributions to probability and statistics : Johns Hopkins manual of gynecology and obstetrics Precision medicine in gynecology and obstetrics / Operative essentials for gynecology and obstetrics Contributions to microbiology and immunology ; Contributions to economic analysis ; Contributions to economic analysis, The Johns Hopkins manual of gynecology and obstetrics /