Low‐dose isotretinoin in acne vulgaris: a critical review

1 Virgili A, Osti F, Maranini C, Carazza M. Photodynamic therapy: parameters predictive of pain. Br J Dermatol 2010; 162:460–1. 2 Grapengiesser S, Ericson M, Gudmundsson F et al. Pain caused by photodynamic therapy of skin cancer. Clin Exp Dermatol 2002; 27:493–7. 3 Lindeburg KE, Brogaard HM, Jemec GB. Pain and photodynamic therapy. Dermatology 2007; 215:206–8. 4 Wiegell SR, Skiveren J, Philipsen PA, Wulf HC. Pain during photodynamic therapy is associated with protoporphyrin IX fluorescence and fluence rate. Br J Dermatol 2008; 158:727–33. 5 Warren CB, Karai LJ, Vidimos A et al. Pain associated with aminolevulinic acid-photodynamic therapy of skin disease. J Am Acad Dermatol 2009; 61:1033–43. 6 Cottrell WJ, Paquette AD, Keymel KR et al. Irradiance-dependent photobleaching and pain in d-aminolevulinic acid-photodynamic therapy of superficial basal cell carcinomas. Clin Cancer Res 2008; 14:4475–83. 7 Radakovic-Fijan S, Blecha-Thalhammer U, Schleyer V et al. Topical aminolaevulinic acid-based photodynamic therapy as a treatment option for psoriasis? Results of a randomized, observer-blinded study. Br J Dermatol 2005; 152:279–83. 8 Sandberg C, Stenquist B, Rosdahl I et al. Important factors for pain during photodynamic therapy for actinic keratosis. Acta Derm Venereol 2006; 86:404–8. 9 Langmack K, Mehta R, Twyman P, Norris S. Topical photodynamic therapy at low fluence rates – theory and practice. J Photochem Photobiol B 2001; 60:37–43. 10 Attili SK, Lesar A, McNeill A et al. An open pilot study of ambulatory photodynamic therapy using a wearable low-irradiance organic light-emitting diode light source in the treatment of nonmelanoma skin cancer. Br J Dermatol 2009; 161:170–3.