Value Set Development for Studies Involving Historical Data. - Kristin Lyman; Melanie Canterberry; Elizabeth Crull; Jason Denton; Fern FitzHenry; Qiaohong Hu; Sharidan K. Parr; Amy Perkins; Dina Zein; Michael E. Matheny; Jason N. Doctor; Daniella Meeker (AMIA, 2019)