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The question is based on this setup: Solution: Lactulose. Gases: Hydrogen and Methane. If you have only used one of these gases then the first two options still apply. However when using different gases and/or solution(s) then one have to pick the 'elaborate in the comments' option.
Positive means abnormal result.
Negative means normal result.
Votes can be changed.
Huge database of papers: https://www.siboinfo.com/studies.html
Positive means abnormal result.
Negative means normal result.
Votes can be changed.
Huge database of papers: https://www.siboinfo.com/studies.html