2001
January January; 158 (1): 1 - 341	February February; 158 (2): 343 - 783	March March; 158 (3): 785 - 1177
April April; 158 (4): 1179 - 1557	May May; 158 (5): 1559 - 1891	June June; 158 (6): 1893 - 2228
July July; 159 (1): 1 - 384	August August; 159 (2): 385 - 775	September September; 159 (3): 777 - 1180
October October; 159 (4): 1181 - 1594	November November; 159 (5): 1595 - 1975	December December; 159 (6): 1977 - 2371