1. Overview of skin aging and photoaging;Helfrich YR;Dermatol Nurs,2008
2. Complications in Periocular Rejuvenation
3. Outcomes in thread lift for facial rejuvenation: a study performed with happy lift™ revitalizing;Savoia A;Dermatol Ther (Heidelb),2014
4. Aging and facial changes– documenting clinical signs, part 1: clinical changes of the aging face;Nkengne A;Skinmed,2012
5. International Society of Aesthetic Plastic surgery (ISAPS).Plastic surgery statistics | global plastic surgery statistics.2018. [online] https://www.isaps.org/medical‐professionals/isaps‐global‐statistics/. Accessed March 30 2018.