title: Letter to Prof Yong-Sheng Wang.
authors.affiliation: Obstetrics and Gynecology Department, Gregorio Marañón University General Hospital, Madrid, Spain. Electronic address: karlaferga@hotmail.com.
authors.forename: Karla
authors.initials: K
authors.lastname: Ferreres García
mesh_terms: D001940:Breast; D001943:Breast Neoplasms; D004322:Drainage; D006801:Humans