Hi:

I am trying to search PubMed abstracts which contains BOTH two terms:
COL4A1 AND Ocular. I am using the following code:

url= "http://eutils.ncbi.nlm.nih.gov/entrez/eutils/esearch.fcgi?"
search = paste(url,
"db=pubmed&term=COL4A1+AND+Ocular[abstract]&retmax=300", sep="")
docId <- xmlTreeParse(getURL(paste(url, search, sep="")),
useInternalNodes=TRUE)


I want to get the reply where BOTH the terms exist in abstract. But it is
not doing that now. Any idea?

Thanks
john

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