Grof Transpersonal Training

http://www.holotropic.com/index.shtml 

The Association for Holotropic Breathwork International (AHBI)

http://www.grof-holotropic-breathwork.net/ 

Stanislav Grof, MD, PhD

http://www.stanislavgrof.com/

Pamela Stockton, MA, LPC

http://www.pamelastocktonlpc.com/ 

Ginger Clarkson

http://www.gingerclarkson.com/

Insight Meditation Houston

http://imhouston.wordpress.com/

Matthew Stelzner (Multidimensional Astrology)

http://www.stelz.biz 

James Eyerman, MD. A Clinical Report of Holotropic Breathwork in 11,000 Psychiatric Inpatients in a Community Hospital Setting

http://www.maps.org/news-letters/v23n1/v23n1_p24-27.pdf