Table 1.

Abbreviations and Definitions.

DGOU	German Society of Orthopedics and Traumatology
ESWT	Extracorporeal shockwave therapy
HA	Hyaluronic acid
ICRS	International Cartilage Regeneration and Joint Preservation Society
OA	Osteoarthritis
OLT	Osteochondral lesion of the talus
PRP	Platelet-rich plasma
SPECT	Single photon emission computed tomography
SPECT-CT	SPECT, in combination with a computed tomography scan
WBCT	Weightbearing computed tomography (syn. Weightbearing DVT—digital volume tomography)