{Reference Type}: Letter {Title}: Response to: 'Presence of anti-phospholipid antibodies in COVID-19: a case series study' by Amezcua-Guerra et al. {Author}: Mathian A;Pineton De Chambrun M;Combes A;Amoura Z; {Journal}: Ann Rheum Dis {Volume}: 80 {Issue}: 5 {Year}: 05 2021 {Factor}: 27.973 {DOI}: 10.1136/annrheumdis-2020-218145 {Abstract}: