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First-Borns More Likely to Develop These 4 Diseases, Scientists Say - Yahoo HealthYahoo Health · Sat, 08 Aug 2026 10:26:00 GMTMassive Study of 10 Million Siblings Links Birth Order To Risk of ADHD, Autism - ScienceAlertScienceAlert · Fri, 07 Aug 2026 08:01:33 GMTWhether you are first-born or not may influence what diseases you get - The IndependentThe Independent · Thu, 06 Aug 2026 07:18:00 GMTOlder or younger sibling? Birth order could determine the diseases you get - NewsweekNewsweek · Tue, 04 Aug 2026 14:16:00 GMT