On the single and multiple associations of COVID-19 post-acute sequelae: 6-month prospective cohort study oleh Beatriz María Jiménez-Rodríguez, José Gutiérrez-Fernández, Eldis Maria Ramos-Urbina, Ana Dolores Romero-Ortiz, Paula Isabel García-Flores, Maria Inmaculada Santiago-Puertas, Maria José Martín-López, Genaro López-Milena, Rene Fabregas, Concepción Morales-García