Table 1. Distribution of articles by citation rate and percentage of total for US and UK.

# of Citations	US	% of Total US	UK	% of Total UK
0	176	5.54	34	5.52
1–5	1007	31.7	200	32.5
6–10	745	23.5	140	22.7
11–50	1082	34.1	220	35.7
51–100	109	3.43	17	2.76
101–200	38	1.20	5	0.81
201–500	18	0.57	0	0
501+	1	0.03	0	0