Nelson BR, Majmudar G, Griffiths CE, Gillard MO, Dixon AE, Tavakkol A, et al. Clinical improvement following dermabrasion of photoaged pores and skin correlates with synthesis of collagen I. Wollina U, Payne CR. Aging well–the function of minimally invasive aesthetic dermatological procedures in women over sixty five. Varani J, Spearman D, Perone P, Fligiel SE, Datta SC, Wang ZQ, et al. Inhibition of kind I procollagen synthesis by broken collagen in photoaged skin and by collagenase-degraded collagen in vitro.