Clinical characteristics of older patients with COVID-19: a systematic review of case reports oleh Luisser Dainner Saavedra Córdova, Alexander Pieter Mayor Vega, Elmer Luján-Carpio, José Francisco Parodi, Enrique Moncada-Mapelli, Isai Armacanqui-Valencia, Jhonatanael Salvador-Ruiz, Dalia Pawer-Pucurimay, Erickson Ydrogo-Cruz, Mylenka Jennifer Chevarría-Arriaga, Macarena Ganoza-Farro, Araceli Meza-Romero, Cynthia Alejandra Zegarra-Rodríguez, Pedro Gustavo Albán-Murguia, Zaira Bailón-Valdez, Naheilli Palacios-Garcia, Danae Quevedo-La-Torre, Angelica Lizeth Alcós-Mamani, Luisa Alisson Gómez-Martel, Max Antonio Roca-Moscoso, Martin Gamboa-Orozco, Alberto Salazar-Granara