mechanisms, factors, urticaria, reactions, fetalis, release, causes, stimuli, mechanism, reaction, hydrops, basis, activation, means, type, adsorption, recognition, binding, origin, diseases, functions, complications, destruction, agents, thrombocytopenia, injury, response, phenomenon, reasons, disorders, defenses, molecules, effect, granulomas, nature, fashion, proteins, events, interactions, pathways, phenomena, rash, trapping, responses, processes, degranulation, precipitants, asthma, activators, triggers