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Letter to the Editor
Diffuse refractory esophageal spasm with excellent response to treatment with sildenafil
Espasmo esofágico difuso refractario con excelente respuesta al tratamiento con sildenafilo
Marina Puya Gamarro
, María del Carmen López Vega, Isabel María Méndez Sánchez
Corresponding author
Servicio de Aparato Digestivo, Agencia Sanitaria Costa del Sol, Marbella, Málaga, Spain