Forest plot of A allele effect of CYP4F3 rs4646904 in all cases (Panel A), adenocarcinoma (Panel B), Squamous cell carcinoma (Panel C), smokers (Panel D), non-smokers (Panel E) from GWASs [the Institute of Cancer Research (ICR) GWAS, the MD Anderson Cancer Center (MDACC) GWAS, the International Agency for Research on Cancer (IARC) GWAS, the National Cancer Institute (NCI) GWAS, the Samuel Lunenfeld Research Institute study (SLRI) GWAS, German Lung Cancer Study (GLC) and Harvard lung cancer study (Harvard)].