Knowledge, attitude and practice towards bio-medical waste management among healthcare workers: a northern Saudi study oleh Ashokkumar Thirunavukkarasu, Ahmad Homoud Al-Hazmi, Umar Farooq Dar, Ahmed Mohammed Alruwaili, Saleh Dhifallah Alsharari, Fahad Adel Alazmi, Saif Farhan Alruwaili, Abdullah Mohammed Alarjan