F. Diane Barth, LCSW is in private practice and runs private study groups in New York. She is the author of the numerous articles in professional journals and chapters in professional books, and of "I Know How You Feel: The Joy and Heartbreak of Friendship in Women’s Lives" (to be published by Houghton Mifflin Harcourt in February 2018). She also writes a blog for Psychology Today: http://www.psychologytoday.com/blog/off-the-couch