Hi,

I am using pubmed API to return some papers. My code is this:

def search(query):
    Entrez.email = 'z.poorbahman1@fooo.bar'
    handle = Entrez.esearch(db='pubmed',
                            usehistory = 'y',
                            sort='relevance',
                            retmax=str(_num),
                            retmode='xml',
                            datetype='pdat',
                            mindate='2014',
                            maxdate='2019',
                            term=query)
    results = Entrez.read(handle)
    return results

def fetch_details(id_list):
    ids = ','.join(id_list)
    Entrez.email = 'z.poorbahman1@foo.bar'
    handle = Entrez.efetch(db='pubmed',
                           retmode='xml',
                           id=ids)
    results = Entrez.read(handle)
    return results

def main():
    result = search("\"Breathing Exercises\"[MeSH Terms] OR \"Coronary Vessels\"[MeSH Terms] OR \"Heart Transplantation\"[MeSH Terms]")
    id_list = results['IdList']
    papers = fetch_details(id_list)

Unfortunately, some returned papers do not have even one of searched mesh terms(Breathing Exercises, Coronary Vessels, Heart Transplantation).

I do not know what the reason is?!

I would appreciate it if you guide me.

Many thanks