{Reference Type}: Letter {Title}: Presence of antiphospholipid antibodies in COVID-19: a case series study. {Author}: Amezcua-Guerra LM;Rojas-Velasco G;Brianza-Padilla M;Vázquez-Rangel A;Márquez-Velasco R;Baranda-Tovar F;Springall R;Gonzalez-Pacheco H;Juárez-Vicuña Y;Tavera-Alonso C;Sanchez-Muñoz F;Hernández-Salas M; {Journal}: Ann Rheum Dis {Volume}: 80 {Issue}: 5 {Year}: 05 2021 {Factor}: 27.973 {DOI}: 10.1136/annrheumdis-2020-218100 {Abstract}: