Comments about novelty (R1: Limited technical contribution, R3: The novelty is modest): 2

We thank the reviewers for their supportive and insightful comments. We address their questions/concerns below. As noted by R2&R3, existing results for self-supervised methods have mainly been obtained on ImageNet. R2: 1- "The extensions from 2D to 3D seem relatively natural. . . Extending CPC to 3D was not straightforward.