In vitro and In vivo Investigation of poly(lactic acid)/hydroxyapatite nanoparticle scaffold containing nandrolone decanoate for the regeneration of critical-sized bone defects oleh Majid Salehi, Arman Ai, Arian Ehterami, Masoumeh Einabadi, Alireza Taslimi, Armin Ai, Hamta Akbarzadeh, Ghazal Jabal Ameli, Saeed Farzamfar, Sadegh Shirian, Nahal Azimi, Faezeh Sadeghi, Naghmeh Bahrami, Arash goodarzi, Jafar Ai