[1] Procter & Gamble, Mason, OH USA
[2] CyDen Ltd, Swansea, Wales
[3] Skin Laser & Surg Specialists NY & NJ, Hackensack, NJ USA
[4] Skinperium Clin, Luxembourg, Luxembourg
[5] Johns Hopkins Univ, Bloomberg Sch Publ Hlth, Baltimore, MD USA
[6] Univ Copenhagen, Hosp Bispebjerg & Frederiksberg, Copenhagen, Denmark
[7] Procter & Gamble Co, Global Prod Stewardship, 8700 Mason Montgomery Rd, Mason, OH 45450 USA