/m/01_wxr	/m/02723p8	/medicine/disease/parent_disease
/m/02723p8	/m/05mdx	/medicine/disease/includes_diseases
/m/05mdx	/m/0142ky	/medicine/disease/symptoms
/m/0qnq	/m/0142ky	/medicine/condition_prevention_factors/conditions_this_may_prevent
