T44.7X6 - Underdosing of beta-adrenoreceptor antagonists T44.7 - Poisoning by, adverse effect of and underdosing of beta-adrenoreceptor antagonists T44.7X - Poisoning by, adverse effect of and underdosing of beta-adrenoreceptor antagonists T44.7X6 - Underdosing of beta-adrenoreceptor antagonists