Variations of author origins in World Journal of Gastroenterology during 2001-2007

Table 1 Co-author articles published in WJG during 2001-2007

Yr	Distribution of co-author articles											Total (articles)	Authors	Cooperation degree	Cooperation rate (%)
	1	2	3	4	5	6	7	8	9	10	> 11
2001	9	18	20	33	26	20	20	14	5	2	6	173	884	5.11	94.80
2002	2	20	23	44	35	39	30	20	10	2	11	236	1313	5.56	99.15
2003	7	30	65	88	131	110	79	55	25	22	21	633	3637	5.75	98.89
2004	12	47	82	112	146	154	105	71	43	25	29	826	4755	5.76	98.55
2005	13	59	113	188	243	273	202	154	86	56	109	1496	9434	6.31	99.13
2006	46	111	149	169	210	191	150	119	74	57	106	1382	8160	5.90	96.67
2007	48	107	129	148	158	139	120	83	48	59	66	1105	6232	5.64	95.66
Total	137	392	581	782	949	926	706	516	291	223	348	5851	34415	5.88	97.66