Pengaruh Lingkungan Kerja, Penghargaan, Sanksi dan Beban Kerja terhadap Pelaksanaan Asuhan Keperawatan dalam ICU di 18 Rumah Sakit, 9 Propinsi di Indonesia Tahun 2008 = The Effects of Work Environment, Reward, Punishment and Work Load to Nursing Outcomes at the ICU of 18 Hospitals in 9 Provinces in Indonesia, in 2008