CONSTRUCT VALIDATION AND RELIABILITY ANALYSIS OF A QUESTIONNAIRE TO EVALUATE THE FACTORS INFLUENCING PHARMACY STAFF'S RECOMMENDATION OF OVER-THE-COUNTER DRUGS IN VIETNAM Article Tran V.D., Dorofeeva V.V., Lagutkina T.P., Денисова М.Н. Ремедиум. Журнал о российском рынке лекарств и медицинской технике. 2019. P. 54-60