{Reference Type}: Letter {Title}: Transfer factor for the treatment of necrobiotic xanthogranuloma. {Author}: Tang Z;Ruan J;Cai S; {Journal}: Dermatol Ther {Volume}: 35 {Issue}: 12 {Year}: 12 2022 {Factor}: 3.858 {DOI}: 10.1111/dth.15894 {Abstract}: