{TAIL ~ The pharmaceutical composition} 13, wherein {HEAD ~ the composition} comprises as gel forming agent a phospholipid, respectively a phospholipid mixture, which contains at least 60% by weight phosphatidylcholine 
{ TAIL ~ The pharmaceutical composition } 13 , wherein { HEAD ~ the composition } comprises as gel forming agent a phospholipid , respectively a phospholipid mixture , which contains at least 60 % by weight phosphatidylcholine
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH