Study	Reason for exclusion
Bhandari 1980	Not randomized controlled trial and no diazepam alone treatment group.
Daud 1981	Randomized controlled trial but no diazepam alone treatment group.
Femi‐Pearse 1966	Not randomized controlled trial.
Hendrickse 1966	Part of continuation of a preliminary randomized study conducted in 1965, but diazepam only group was excluded.
Husada 1976	Not randomized and no diazepam alone group. Diazepam was given to all treatment groups.
Joseph 1978	Not randomized controlled trial.
Keswan 1983	Not ramdomized controlled trial.
Norredam 1970	Not randomized controlled trial.
Sugitha 1983	Not randomized controlled trial.
Vassa 1974	Not randomized and no diazepam alone treatment group.