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The head rotation among different subtype HAs.
| Group-1 (comparing to H1pdm) | Group-2 (comparing to H3) ∗ | ||
|---|---|---|---|
| H1 | 9.54° | H4 | 6.07° |
| H2 | 7.07° | H7 | 3.10° |
| H5 | 4.54° | H10 | 0.93° |
| H6 | 5.54° | H14 | 3.49° |
| H8 | 11.11° | H15 | 4.65° |
| H9 | 13.01° | ||
| H11 | 8.64° | ||
| H13 | 5.97° | ||
| H16 | 13.19° | ||
| H17 | 14.83° | ||
| H18 | 7.82° | ||
H1pdm vs H3 is 27.67°.
