Abstract: A comb attachment for a hair clipper includes a base having a depression adjacent a back edge of the attachment and a flexible clip extending outwardly from the back edge. The depression locates a user's finger or thumb when pressing the base until the clip flexes around the edge of the blade. The comb attachment is removed by pulling the clip back around the blade. The flexible clip can be a cantilever having two spaced arch-shaped arms extending from the base and secured to each other at their cantilevered ends by a cross-member. The bottom surface of the cross-member can be angled to facilitate release of the clip and removal of the attachment.

Abstract: A comb attachment for a hair clipper includes a base having a depression adjacent a back edge of the attachment and a flexible clip extending outwardly from the back edge. The depression locates a user's finger or thumb when pressing the base until the clip flexes around the edge of the blade. The comb attachment is removed by pulling the clip back around the blade. The flexible clip can be a cantilever having two spaced arch-shaped arms extending from the base and secured to each other at their cantilevered ends by a cross-member. The bottom surface of the cross-member can be angled to facilitate release of the clip and removal of the attachment.

Abstract: Provided herein are methods of treating central nervous system injury (e.g., spinal cord injury) using GGF2 and compositions comprising GGF2. For example, provided is a method of treating spinal cord injury in a subject, comprising administering at least one dosage of less than 1 mg/kg of GGF2 to the subject. Also provided are methods of promoting proliferation of neural stem cells and of promoting revascularization comprising using GGF2 and compositions comprising GGF2.