Korean Society of Obstetrics and Gynecology.

Scientific Research Publishing Inc..

Cancer Information Group.

Begell House Inc..

Казахский национальный педагогический университет им. Абая.

BMJ Publishing Group.

Slovak Academic Press Ltd..

Professional Medical Publications.

Elsevier BV.

Hellenics Society of Obstetrics and Gynecology.

AME Publishing Company.