digraph G {
 rankdir=LR
 node [shape=box, fontsize=9, height=0.1, width=0.05 ]
 edge [arrowsize=0.5, len=0.1]
"InputMedicalFactors\n"
"MiddleMedicalFactors\n"
"PatientFactors\n"
"Treatment\n"
"diagnosis\n"
"InputMedicalFactors\n"->"MiddleMedicalFactors\n"
"diagnosis\n"->"Treatment\n"
"InputMedicalFactors\n"->"Treatment\n"
"MiddleMedicalFactors\n"->"Treatment\n"
"PatientFactors\n"->"MiddleMedicalFactors\n"
"PatientFactors\n"->"Treatment\n"
}