sentences:  He has published several essays and articles, wrote a column for PlanetOut.com and has appeared in eight documentary films.Green has served on the boards of the Transgender Law and Policy Institute and the Equality Project, was an advisory board member of the National Center for Transgender Equality, and chaired the board of Gender Education and Advocacy.He served as president of the World Professional Association for Transgender Health from 2014 to 2016.