POP Seminar Series: Chao Chen and Adel Alrwisan Published On September 5, 2014 Social Media Share this article Facebook Twitter LinkedIn Seminar Announcement Chao Chen “Association between Hospital Volume and Post-operative Outcomes for Total Hip Replacement” and Adel Alrwisan “Epidemiology of Ear Drum Persistent Perforations Following Tympanostomy Tubes” September 11, 2014 at 9:30 am HPNP Building, Room 1101