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. Author manuscript; available in PMC: 2009 Sep 14.
Published in final edited form as: J Stat Softw. 2008 May 1;24(3):nihpa54860. doi: 10.18637/jss.v024.i03
edges nodematch.Grade.7 nodematch.Grade.8
−6.0000000 3.0389517 3.2183996
nodematch.Grade.9 nodematch.Grade.10 nodematch.Grade.11
2.6489700 2.8761216 3.5878954
nodematch.Grade.12 nodefactor.Sex.M
3.8633896 −0.2854673