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BMJ 323 , 171, (2001)

A total of 83 RCTs that met the PICO-SD criteria were selected from the systematic reviews.16, 33, 61, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141 Five additional RCTs were identified to incorporate recent evidence,142, 143, 144, 145, 146 resulting in a final selection of 88 studies

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[21] Smoking ban [edit] The Tobacco Regulation Act bans smoking in public places such as schools and recreational facilities, elevators and stairwells, hospitals, nursing homes, laboratories, public conveyances and public facilities such as airports and ship terminals, train and bus stations, restaurants and conference halls, with the exception of separate smoking rooms