In the heart of a downtown Austin block where homeless adults congregate and seek shelter at night, some of the brightest college students gather in a nearby building. The free C.D. Doyle Clinic is open for business. In this airy space, an unusual pairing of highly motivated students and homeless men and women interact in ways that shape lives and inspire gratitude.The clinic was founded in 2011 by students from UTMB, which sends some third- and fourth-year medical students to Austin for clinical training. The founders wanted to replicate a similar free clinic in Galveston because they knew they would miss it when they’re sent to Austin, said Sharpe, the director. The clinic is funded by small grants, including from UTMB and the St. David’s Foundation. A goal is to reduce unnecessary emergency room visits. Patients and volunteers benefit from the interactions.