Could psoralen plus ultraviolet A1 ("PUVA1") work? Depth penetration achieved by phototherapy lamps.

Could psoralen plus ultraviolet A1 ("PUVA1") work? Depth penetration achieved by phototherapy lamps. Br J Dermatol. 2019 Sep 28;: Authors: Barnard IRM, Eadie E, McMillan L, Moseley H, Brown T, Wood K, Dawe R Abstract Psoralen and ultraviolet A (PUVA) is useful in treating various hand and foot skin diseases.1 Most cases of psoriasis respond well to phototherapy or PUVA. However, for some diseases, such as palmoplantar pustular psoriasis, PUVA is not always sufficient to produce therapeutic effect. If PUVA fails, it is sometimes necessary to progress to other treatments such as Grenz ray therapy (where available),2 systemic retinoid or systemic immunosuppression. Could "PUVA1" (psoralen combined with ultraviolet A1 long wavelength ultraviolet A [UVA]) work in cases where conventional PUVA (psoralen plus broadband UVA) has been inadequate?. PMID: 31562820 [PubMed - as supplied by publisher]
Source: The British Journal of Dermatology - Category: Dermatology Authors: Tags: Br J Dermatol Source Type: research