Table 1.

Overview on the used ELISA kits.

Target Protein	Role	Order #	Company
NTX (collagen-type I N-telopeptide)	Collagen degradation	E-EL-H0836	Elabscience, Houston, TX, USA
OPG (osteoprotegerin)	Inhibitor for sRANKL	ABIN411341	Antibodies-online, Aachen, Germany
PINP (procollagen type I N-terminal propeptide)	Collagen formation	8003	TecoMedical, Neufahrn, Germany
sRANKL (soluble receptor activator of nuclear factor kappa-Β ligand	Inducer for osteoclastogenesis	900-K142	Peprotech, Hamburg, Germany