((tissue OR tissues OR
penetrat* OR permeat*) AND (level* OR
penetrat* OR permeat* OR concentration* OR pharmacokinetic* OR "pharmacokinetics"[sh]))
This is a first attempt at this concept. Suggestions, as always, are welcome.
Individual tissue names --.e.g. bone, skin, muscle.. -- and tissue adjectives -- e.g. hepatic, osseous, ... -- could be OR'd into the tissue term list.
