The chains have always operated completely independently of one another, and have never shared joint ownership -- so are maybe better referred to as distant cousins
Strengths and limitations This study had many strengths, a nationally representative US sample, choice of a well-validated measure of global health that includes a physical and mental component 17,35 , testing of the associations between a novel smoking-descriptor (childhood smoking) and poor HRQOL, adjustment for many other aspects of cigarette smoking that also independently relate to HRQOL, and a sensitivity analysis that appropriately considers smoking-related disease measures as mediators rather than independent risk factors
Its probably a minor issue (like hemorrhoids), although you should see a doctor soon to be safe
Hard packs often protect better in real use because: The structure helps the inner foil stay tight The opening area stays cleaner The pack doesnt collapse and expose edges Soft packs can still stay fresh, but they need better storage habits: Keep them in a stable pocket, not loose in a bag Avoid bending or compressing the pack Close and store away from heat 6
