{Reference Type}: Case Reports {Title}: A 20-year-old Woman with a Red Nodule on Her Right Knee: A Quiz. {Author}: Zhou J;Hua C;Chen H;Chen Y;Lin X; {Journal}: Acta Derm Venereol {Volume}: 104 {Issue}: 0 {Year}: 2024 Jun 26 {Factor}: 3.875 {DOI}: 10.2340/actadv.v104.35391