recurrent erythema multiformeerythema multiforme behandlingatypical erythema multiformeerythema multiforme contagiousurticaria erythema multiformeerythema multiforme lesionsmycoplasma erythema multiformesevere erythema multiformeerythema multiforme pediatricerythema multiforme in pregnancyerythema multiforme durationerythema multiforme syndrome