Uji Validitas dan Reliabilitas Fatigue Risk Assessment and Management in High-Risk Environments (FRAME) Survey Versi Bahasa Indonesia Sebagai Instrumen Kelelahan Pada Pekerja Anjungan Pengeboran Minyak dan Gas Lepas Pantai = Validity and reliability study of The Indonesian Version of Fatigue Risk Assessment and Management in high-risk Environments (FRAME) Survey in offshore oil and gas drilling platform workers