Korean Society of Obstetrics and Gynecology.

Scientific Research Publishing Inc..

Cancer Information Group.

Begell House Inc..

BMJ Publishing Group.

Казахский национальный педагогический университет им. Абая.

Slovak Academic Press Ltd..

Professional Medical Publications.

Elsevier BV.

Hellenics Society of Obstetrics and Gynecology.

AME Publishing Company.