JSM Proceedings, Biometrics Section. Alexandria, VA: American Statistical Association (ASA). 199.
Yang C, Tilley BC, Selassie AW, Greene R. JSM Proceedings, Biometrics Section. Alexandria, VA: American Statistical Association (ASA). 199.
. Comparison between regression with latent variables and regression with composite scores for subjective outcomes from instruments in clinical trials and medical research. 2011.