+M1%/descendant::Article[ descendant::AbstractText[ contains (., "foot") or contains( ., "feet") ] ]
+M2%/descendant::Article[ descendant::AbstractText[ contains ( . , "plus") ] ]
+M3%/descendant::Article[ descendant::AbstractText[ contains ( . , "plus") or contains ( . , "for") ] ]
+M4%/descendant::Article[ descendant::AbstractText[ contains ( . , "plus") and not(contains ( . , "for")) ] ]
+M5%/descendant::MedlineCitation/child::Article/child::AuthorList/child::Author[ child::LastName[starts-with( ., "Bar")]]
+M6%/descendant::*[ descendant::LastName[ contains( ., "Nguyen") ] ]
+M7%/descendant::*/descendant::*[ contains( ., "epididymis") ]
+M8%/descendant::*[ descendant::PublicationType[ ends-with( ., "Article") ]]
+M9%/descendant::MedlineCitation[ descendant::Country[ contains( ., "AUSTRALIA") ] ]