发文地区与机构
近年国家 / 地区发文量统计
| 国家 / 地区 | 发文量 |
|---|---|
| USA | 45 |
| Iran | 3 |
| CHINA MAINLAND | 2 |
| GERMANY (FED REP GER) | 2 |
| Bangladesh | 1 |
| Canada | 1 |
| England | 1 |
| Ethiopia | 1 |
| France | 1 |
| Ghana | 1 |
近年机构发文量统计
| 机构 | 发文量 |
|---|---|
| RAND CORPORATION | 6 |
| JOHNS HOPKINS UNIVERSITY | 5 |
| UNIVERSITY OF CHICAGO | 5 |
| HARVARD UNIVERSITY | 4 |
| UNIVERSITY OF MICHIGAN SYSTEM | 4 |
| KAISER PERMANENTE | 3 |
| STANFORD UNIVERSITY | 3 |
| UNIVERSITY OF ILLINOIS SYSTEM | 3 |
| UNIVERSITY OF PENNSYLVANIA | 3 |
| BROWN UNIVERSITY | 2 |