+ Fig3-1.cgmb XTimes New RomanTimes New Roman BOLDTimes New Roman BOLD ITALICTimes New Roman ITALIC"SANSI CGM Version 3_ImageMark Software Labs v03.01"Ffk FROM COREL B b JP &<0F 2dA 0F 2dA Pb P@0Q,",")Lz)LP@(Q<z >P@(7 7P@0R'P@(%$>%P@(#$>#P@(".$>".P@( g$> gP@($>P@($>P@($>P@(J$>JP@($>P@($>8*8P@(#*$)P@(!9"8P@(%*&{)P@(4ZJ7JP@(5#6"P@(7{.8`JP@()%+g%P@()#+g#P@42Hk*Hk*J2J2HkP@44F*F*Hk4Hk4FP@(&".)".P@()".+g".P@(&".&#P@0R=N)=N)5+g5P@04G6$G6$204Z20P@0R)L"t)L"t,?,P@8R) ) .0;.0;L?LP@04)=L)=LIO?IOP@(9E?EP@(9EC:+BP@0H KIKI;H|;P@0H|;I;I+H +P@049999G?GP@049M99M9'?'P@0+8j+D8T+ 8*7P@(*7*1P@0*1+ 1+D1b+1LP@(+1L4,1LP@04,1L4}1b4141P@(4147P@047484}8T4,8jP@(4,8j+8jP@4 . . P@4 lI lI lP@05UP@(UP@0|C5-P@(5- -P@0 - C V| lP@( l lUP@0 lU V  P@( 5P@4 lII l lIP@0 - l-P@4 l  I lI l P@4 l   l l P@05I3P@( P@0  B 5 P@(5 P@0  V B l P@( l lP@0 l V 3 IP@( I5IP@0 ,   E 0 P@( 0 0 vP@0 0 v E %  P@(  YP@0 Y  % vP@( v P@0  Y ,P@( Y , ,P@($>$>8P@0IO"tIO"t9*9P@0R<'<'3+g3P@(XP@(X,,P@(5 5P@(3 3P@( 7 3P@( 9M 7P@(4Z6$P@(4Z6$P@0+(h+D(R+ (*'P@(*'*wP@0*w+ '+D+P@(+4,P@04,4}4'4wP@(4w4'P@04'4(4}(R4,(hP@(4,(h+(hP@(6$6$P@(4Z6$P@(4Z g6$ gP@,4)L6$)L6$P@(4Z7P@(4Z7P@(77P@,48787JP@(7J7P@4 AN"AN"C C ANP@0ANqA88@"@P@("@"M>OF?OF?MP@0?DM>M>Mr>M"P@(>M">E|P@0>E|>E,>D?DDP@(?DDGDP@0GDH-DHfE,H|E|P@(H|E|H|M"P@0H|M"HfMrH-MGMP@(GM?DMP@(>HkH|HkP@4F?;>;>>1F?>1F?;P@4H|:1>:1>;H|;H|:1P@42:1*:1*->/F?/F?-P@0?D->->-o>-P@(>->'@P@0>'@>&>&?D&P@(?D&G&P@0G&H-&Hf&H|'@P@(H|'@H|-P@0H|-Hf-oH--G-P@(G-?D-P@(>(hH|(hP@42*/**/*,h2,h2*/P@44(h*(h**/4*/4(hP@44!K*!K*(h4(h4!KP@44**!K4!K4P@4R(hz(hz*/R*/R(hP@4*/z*/z,h,h*/P@4Rzz(hR(hRP@0  v  eP@0 eY  ,P@0,; lP@,  l%\RQQ@13[8]@J[8]@ REFERS-TO@ enon-key@=(1P@0@j=@j=.".@ l+0:N@@ H9identified by the non-oid primary key in other contexts).@X.01@@13:N@=N1@ l=N0:N@ l?1@sI0:N@/111@sF20:N@sMO0:N@*11@20:N@*:11@(20:N@(4i0:N@=1@5?00:N@5?G1@#Y-0:N@*71@I0:N@&;1@;0:1@_optional@_, mandatory@"@j0:1@1pg_type@*pg_am@+g:pg_proc@+gH pg_language@?N3pg_amop@?1attnumQB@,hrelamQB@./oid@"Llindrelid@"Jindkey@"Hindproc@"Gindpred@