ll functions that accept df_visit as a parameter.
Checks for NA columns, numeric visits and AEs, implicitly missing and
duplicated visits."><meta property="og:description" content="Internal function used by all functions that accept df_visit as a parameter.
Checks for NA columns, numeric visits and AEs, implicitly missing and
duplicated visits."><meta property="og:image" content="https://openpharma.github.io/simaerep/logo.png"><!-- Global site tag (gtag.js) - Google Analytics --><script async src="https://w