I have no investment in Facebook, and don't like some of the things I hear, but have been a member of several of its Pyloric Stenosis groups for 10 or so years - and learnt so much! The biggest and best groups are "closed" - you have to join them before you can "see" or access and post to their discussions. Well over 1,000 adult and infant PS survivors are members and form an impressive range and depth of experience. WLS for people with scarring from the infant and adult PS surgery has been discussed several times.