Development and usability testing of HEARTPA♀N: protocol for a mixed methods strategy to develop an integrated smartphone and web-based intervention for women with cardiac pain oleh France Légare, Colleen Norris, Michael McGillion, Ann Kristin Bjørnnes, Jennifer Stinson, Abida Dhukai, Lynn Cooper, Joel Katz, Chitra Lalloo, Marit Leegaard, Mike Lovas, Judith McFetridge-Durdle, Laura Parente, Rose Patterson, Leah Pink, Jennifer Price, Akib Uddin, J Charles Victor, Judy Watt-Watson, Carol Auld, Christine Faubert, Deborah Park, Marianne Park, Beatrice Rickard, Vincenza Spiteri DeBonis