recurrent erythema multiformeerythema multiforme behandlingatypical erythema multiformeerythema multiforme contagiouserythema multiforme lesionsmycoplasma erythema multiformesevere erythema multiformeerythema multiforme pediatricerythema multiforme in pregnancyerythema multiforme durationerythema multiforme syndromeurticaria multiforme pediatrics