 - PUVA or Grenz ray therapy, UVB therapy, systemic treatment with biological therapies, corticosteroids, or other therapies with an effect on psoriasis, topical treatment with corticosteroids or vitamin D analogues, treatment with enzymatic inductors, cytochrome P450 inhibitors, hypoglycemic sulfonamides, antidepressive medications, estrogen therapy, calcium supplements or vitamin D supplements. 