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Yarlas, Aaron, Stephen M. Maher, Martha S. Bayliss, Andrew Lovley, Joseph C. Cappelleri, and Marco D. DiBonaventura. "Psychometric Validation of the Work Productivity and Activity Impairment Questionnaire in Ulcerative Colitis: Results From a Systematic Literature Review." J Patient Rep Outcomes 2018.

Yarlas, Aaron, et al. "Psychometric Validation of the Work Productivity and Activity Impairment Questionnaire in Ulcerative Colitis: Results From a Systematic Literature Review." J Patient Rep Outcomes 2018.