User‐Centered Design to Develop Automated Short Message Service Messaging for Patient Support of Rheumatic Heart Disease Secondary Antibiotic Prophylaxis oleh Ndate Fall, Francis Odong, Jenipher Thembo, Jafesi Pulle, Jacob Hoekzema, Joselyn Rwebembera, Sarah de Loizaga, Doreen Nakagaayi, Neema Minja, Allison Webel, David Watkins, Andrea Beaton