I am 69 tears old and due to lack of ability to walk, I have gotten overweight. My local Doc feels I will be a health risk and suggests I go to the Uof PA. Hospital. However he doesn't suggest anyone specifically. I have been told the Rothman Institute in Philadelphia is the best. Has anyone had any experience with Rothman or the University of Penn Medical Group? Also I have heard of Hip and Knee Farms, where you stay a month and have pre-and post-surgery therapy. Is any one familiar with that concept.