A ‘poor’-rated Indian meta-analysis reported associations between combined SLT-products and stomach (borderline significance, OR = 1.26; 95% CI 1.00–1.60) and laryngeal cancers (OR = 2.84; 95% CI 2.18–3.70); both were non-significant in random effects models (OR = 1.31; 95% CI 0.92, 1.87, OR = 1.79; 95% CI 0.70–4.54) and there was no association with lung cancer (OR = 0.91; 95% CI 0.76–1.09) [ 22 ].
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