Estimating posttraumatic stress disorder severity in the presence of differential item functioning across populations, comorbidities, and interview measures: Introduction to Project Harmony. - Morgan‐López, Antonio A.; Hien, Denise A.; Saraiya, Tanya C.; Saavedra, Lissette M.; Norman, Sonya B.; Killeen, Therese K.; Simpson, Tracy L.; Fitzpatrick, Skye; Mills, Katherine L.; Ruglass, Lesia M.; Back, Sudie E.; López‐Castro, Teresa (Journal of Traumatic Stress, 2022)