Retraction note: Histopathological features of bone regeneration in a canine segmental ulnar defect model. Issue 1 (December 2016) - Hobbenaghi, Rahim; Mahboob, Pariya; Saifzadeh, Siamak; Javanbakht, Javad; Manesh, Javad; Mortezaee, Rasool; Touni, Seyed; Hosseini, Ehsan; Aghajanshakeri, Shahin; Moloudizargari, Milad; Javaherypour, Soheil