[文献资料]How well was the study conducted？

Externalvalidityreferstothedegre‐bletotheoutsideworld。Allstudyparticipantsshouldbeacco undertakenonanintentiontotreatba（par‐ticipantsanalysedaccordingtotheg，regardlessof whethertheydroppedout，fullycompliedwiththetreatmentore）.Posttreatmentchanges）canbeapr ......