https://github.com/ccheng10/ccheng10.github.io/blob/3ef94b064fdab047ff511e837092f4f147798713/paper/jmp_ctcheng.pdf. https://github.com/ccheng10/ccheng10.github.io/blob/b356ec238cc877c126439041a2bcc03230c8d75a/paper/hospitalresponse_ctcheng.pdf. https://github.com/ccheng10/ccheng10.github.io/blob/e043ebf74cb140e8c4b6a8f0cac3116bd1ff0ba7/paper/prenatalcare_ctcheng.pdf.