Association of esophageal squamous cell carcinoma with head and neck cancer Cautar El Maimouni; Henry Córdova; Sterling Feliz-Ruiz; Irina Luzko Scheid; Leticia Moreira; Joan Llach; Isis K. Araujo; Begoña González-Suárez; Àngels Ginés; Gloria Fernández-Esparrach;