1. Image with permission from PR Buenzli and NA Sims.

2. J Bone Miner Res 2015;30:346 (Fig. 3)
Reproduced from J Bone Miner Res 2015;30: with permission of the American Society of Bone and Mineral Research.

3. Front Endocrinol 2015;6:41 (Fig. 1)
Reproduced from Front Endocrinol 2015;6:41 under the terms of the Creative Commons Attribution License (CC BY).

4. J Bone Miner Res 2015;30:657 (Fig. 4)
Reproduced from J Bone Miner Res 2015;30: with permission of the American Society of Bone and Mineral Research.