{HEAD ~ The composition} 1, wherein {TAIL ~ the polymer system} comprises hydroxypropylmethylcellulose and ethylcellulose 
{ HEAD ~ The composition } 1 , wherein { TAIL ~ the polymer system } comprises hydroxypropylmethylcellulose and ethylcellulose
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH