docs: function patientBirthdayRep(patient) {
      let b = patient.birthday;
      if (b === "0000-00-00") {
          return "";
      }
      let m = moment(b);
      if (!m.isValid()) {
          return `（生年月日が不適切：${b}）`;
      }
      return kanjidate.format(kanjidate.f2, m.format("YYYY-MM-DD")) + "生";
  }