The remaining twin studies (n = 7) verified questionnaire-based zygosity through DNA mapping.
We contacted the spa managers to verify questionnaire distribution.
Evidence of a difference between rules verified from questionnaire data and those observed in practice will help to raise midwives' awareness of the need for a more clinically effective approach to pain relief during labour.
Chemotherapy delivery costs were assessed in each sub-study centre with external validity verified by questionnaire to all other centres.
Statin use was confirmed via pharmacy records, and health outcomes were verified by questionnaire and medical record review.
Studies using the 12-item Short Form Health Survey (SF-12) have verified the questionnaire as a valid and reliable measure for evaluating overall community health status [ 10, 11] as well as minority ethnic groups [ 12, 13].
Firstly, two hypotheses on e-learners' different learning path preferences for four different learning scenarios (initial learning, usual review, pre-exam learning and pre-exam review) are verified through questionnaire-based statistical analysis.
Quality control: the supervision team verified all questionnaires within the same week they had been applied.
The duration of type 2 diabetes and the number of medications were verified by questionnaires as well as review of the patients' medical records.
All potentially incident cases were verified by questionnaires mailed to the diagnosing physician asking about the date and type of diagnosis, diagnostic tests, and treatment of diabetes.
All incident cases were verified by questionnaires mailed to the diagnosing physician, requesting details of the date and type of diagnosis, diagnostic tests and treatment of diabetes.
