Источники записей
BMJ Publishing Group.
BJGP OPEN
Журнал
Royal College of General Practitioners.
Dove Medical Press Ltd.
BMJ PAEDIATRICS OPEN
Журнал
BMJ Publishing Group.
BMJ ONCOLOGY
Журнал
BMJ.
BMJ Publishing Group.
Korean Society of Obstetrics and Gynecology.
CREATIVE EDUCATION
Журнал
Scientific Research Publishing Inc..
Cancer Information Group.
Begell House Inc..