Felker BL, Hedrick SC, Chaney EF, Liu CF, Heagerty P, Caples H, Lin P, Katon W. Identifying Depressed Patients With a High Risk of Comorbid Anxiety in Primary Care. Prim Care Companion J Clin Psychiatry. 2003 Jun;5(3):104-110.
Felker BL, Hedrick SC, Chaney EF, Liu CF, Heagerty P, Caples H, Lin P, Katon W. Identifying Depressed Patients With a High Risk of Comorbid Anxiety in Primary Care. Prim Care Companion J Clin Psychiatry. 2003 Jun;5(3):104-110.