2001
January January; 80 (1): 1 - 561	February February; 80 (2): 565 - 1029	March March; 80 (3): 1031 - 1614
April April; 80 (4): 1617 - 2037	May May; 80 (5): 2039 - 2487	June June; 80 (6): 2493 - 3026
July July; 81 (1): 1 - 594	August August; 81 (2): 601 - 1205	September September; 81 (3): 1208 - 1828
October October; 81 (4): 1831 - 2422	November November; 81 (5): 2425 - 2992	December December; 81 (6): 2995 - 3596