Knowledge, attitudes and perceptions of workers in indoor bars, beer halls and discotheques towards exposure to second-hand smoking in the two cities in Swaziland
Sabelo V Dlamini, Musa C Dlamini, Londiwe D Hlope, Jameson S Siphepho, Sakhile S Masuku, Alfred F Murye, Vusie Lokotfwako