T39.1X6 - Underdosing of 4-Aminophenol derivatives T39.1 - Poisoning by, adverse effect of and underdosing of 4-Aminophenol derivatives T39.1X - Poisoning by, adverse effect of and underdosing of 4-Aminophenol derivatives T39.1X6 - Underdosing of 4-Aminophenol derivatives