I'm preparing a manuscript for publication in a medical journal about Inflammatory Bowel Disease (IBD). I understand that I have to define the acronym IBD once, when first used in the text (technically twice, both in the abstract and main text). 'Inflammatory Bowel Disease' is also part of the study name, which has its own acronym. If I have already introduced 'IBD', can I use this acronym when defining the acronym for the study name?
Example:
"Inflammatory Bowel Disease (IBD) is a chronic disease [...] The Treatment of Inflammatory Bowel Disease in Daily Practice (TIBDDP) study..."
Or:
"Inflammatory Bowel Disease (IBD) is a chronic disease [...] The Treatment of IBD in Daily Practice (TIBDDP) study..."
Just as a note: IBD is an acronym that is commonly used and well-known among my target audience.