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Step 2 Replace one session at a time Don't try to quit cold turkey

I guess that old saying still stands today

Am J Respir Crit Care Med 185:12921300 Schikowski T, Adam M, Marcon A, Cai Y, Vierkotter A, Carsin AE, Jacquemin B, Al Kanani Z, Beelen R, Birk M, Bridevaux PO, Brunekeef B, Burney P, Cirach M, Cyrys J, de Hoogh K, de Marco R, de Nazelle A, Declercq C, Forsberg B, Hardy R, Heinrich J, Hoek G, Jarvis D, Keidel D, Kuh D, Kuhlbusch T, Migliore E, Mosler G, Nieuwenhuijsen MJ, Phuleria H, Rochat T, Schindler C, Villani S, Tsai MY, Zemp E, Hansell A, Kauffmann F, Sunyer J, Probst-Hensch N, Kramer U, Kunzli N (2014) Association of ambient air pollution with the prevalence and incidence of COPD

References Bullen C, McRobbie H, Thornley S, Glover M, Lin R, Laugesen M