| 1 | This is a spectrum disorder with plenty of variables. | |
| 2 | It never will be - there are just too many variables. | |
| 3 | And those variables may better explain the association than altitude, per se. | |
| 4 | And progress in translating the science into real action has been variable. | |
| 5 | The biggest variable, experts say, is how you feel about your current job. |