May be stored at RT for short-term only. Long-term storage is recommended at 4°C. For maximum recovery of product, centrifuge the original vial prior to removing the cap.
References
Estellat, C. et al.: Arch. Int. Med., 172, 237 (2012); Du, F. et al.: Arth. Res. Ther., 10 (2008); Tanaka, K. et al.: Rheumatol. Rep., 1, 11 (2009)