Characteristics, attitudes, and the odds for positive attitude toward clinical trial: A study on Indonesian COVID-19 vaccine trial participants oleh Nani Maharani, Nuvi Gustriawanto, Yetty M Nency, Endang Mahati, Glenn F Yeremia, Dimas T Anantyo, Rebriarina Hapsari, Mulyono Mulyono, Setyo G Pramudo, Nur Farhanah