Efficacy, safety, and patient satisfaction of a monophasic cohesive polydensified matrix versus a biphasic nonanimal stabilized hyaluronic acid filler after single injection in nasolabial folds Buntrock, Heike Reuther, Tilmann Prager, Welf Kerscher, Martina 2013 - Forschungsinformationssystem der UHH