Correction: Prediction of remaining useful life (RUL) of Komatsu excavator under reliability analysis in the Weibull-frailty model

• Awat Ghomghaleh, 
• Reza Khaloukakaie, 
• Mohammad Ataei, 
• Abbas Barabadi, 
• Ali Nouri Qarahasanlou, 
• Omeid Rahmani, 
• Amin Beiranvand Pour