PNG  IHDR{sRGBgAMA a pHYsod ,IDATx^nH- :я@Y"PLoS>Nh.Ǐw( }X]>P&4;ٻ|?ޡP''LivbEw=~CNNĊf{n]u|ûwVԮ*gwU[Qʧ﫜]_?zWnE*rvw}n]u|uUQJݧN VŤn}pD]UԮRvBU1[_?QW}ꤨlUL8GUE*u:)j'4[*κuUQJݧN VŤn}pD]U J[_?QWwuBRgk'ꬺ8GU]Ьډ:*κuUqW'4++uvΪn}pD]U J[_?QW jΪn}pD]UNLf'Իꪕ:*κuUQ;1P磌Vꬺ8GUEdvBZ[_?QW jΪn}n&w5[ꤨЬûlUvBRn7gwfrWUN JQݜ]_?]V:)j'4+Evsvw}n&w5[ꤨЬp]>Puww=~C.Ǐw(<~0g?:Y&V!PgMC:Ϊ[tBU7:noeN uUZ=+'LYu:)Uje0Wgg#PWꪕݳrd_U'B]UVv }uV|~8N uUZ=+'LYuH`ob'9lH`ob'9lH`ob'9lH`ob'9lH`ob'9lHfPԮ}r7QŵBQFUgNh E*'wUNZ\;+h܍nT:yzkqfPԮ}r7Q|YVtcbwW,7(lE7v+vwOrbYVtcbwW,7(lE7v+vwOrbYVtcbwW~:NF7BzW|{JU'wUN^ANhΪэP'U'_a^rRgFUWP望z/9Znt*+wW`R oQWhVV&ݐb)jwV4++يnG{@[U+lE7}=X]A-d>P,EuՊfee2[ lS>uՊf'frCR釟RV4;q7BN?O]ىЬ&>w}NfP7?SWhvn&74+ϝ~8NUMЬhVV^]o-V'E*u_&LnhVV4++̮vv&74++Wf[IQJW +ꤨ]݄ ʊfeټG4++V줛Xj6o}eʊf:;&V[_YzDjNfWѬhZnbټG4++V줛XjvdVh yߢYyzɬ>y-.&E#Y}.[]L~fG&B]Ȼ3[Lfɻow1-gE PWhV uwSoB|Z*jERzC+R)U+BP'_JZѬ&P': T uՊfP7q7:)WXɾ:NV4[ꪕ@ urd_U'+ ud_ :9aΪVje2/B0WgɊfB]2bHNN쫳dEUZ~@]UԮ}R +-PWhꪢvBw o UE*']uUQI*j'4{@]UԮ}R +]?}B7]Ev{ )jWѾ><~0g?'tCUo;) ݐvs}B7]Ev;WN}޾w)jw*&b}Rn7j_UL:)jzߥnvվtR=KQ쾫}U1館;w}:[UUIVl*W[_?zW'Y\o}n]ud֮rվûw}:[UGUEv3ىBnsGUEv3ىBnsGUEv3ىBnsGUEv3ىBnsGUEv3ىBnsGUNLfEݧnሺ݉ɬYY9]_?QW;1uV4++g#bw'&Sۊfelv}pD]UdV}v[ѬͮIWY{8~8*&]g}ሺto#bU+qV'nIWY{8~x7jDQ F&rcx'jDQ F&rcx'jDQ F&rcx'jDQ F&rcx'jDQ F&rc}Rw1-V]o]L~ff.:yߢj=KNhZjv}Rw1-V!?roj IENDB`