How to recognize, deal with and possibly prevent a stroke are described by nurse Michelle Vallelunga and registered dietitian nutritionist Rebecca Hausserman.\xa0 How to recognize, deal with and possibly prevent a stroke are described by nurse Michelle Vallelunga and registered dietitian nutritionist Rebecca Hausserman.\xa0 Ahmed Shawkat, MD Ahmed Shawkat, MD, a lung specialist, talks about asthma and its treatments. Orthopedic surgeon, a lung specialist, talks about asthma and its treatments. Orthopedic surgeon Brian Harley, MD Brian Harley, MD, explains how wrist fractures are repaired., explains how wrist fractures are repaired.