TNF promoter polymorphisms are associated with genetic susceptibility in COPD secondary to tobacco smoking and biomass burning

Juan Manuel Reséndiz-Hernández, Enrique Ambrocio-Ortiz, Gloria Pérez-Rubio, Luis Alberto López-Flores, Edgar Abarca-Rojano, Gandhi Fernando Pavón-Romero, Fernando Flores-Trujillo, Rafael de Jesús Hernández-Zenteno, Ángel Camarena, Martha Pérez-Rodríguez, Ana María Salazar, Alejandra Ramírez-Venegas, Ramcés Falfán-Valencia