Much of the success of the Polio Eradication Initiative (PEI) to date can be attributed to massive use of oral polio vaccine (OPV), administered through routine immunisation services and supplementary immunisation activities in the form of National Immunisation Days (NIDs) and subnational immunisation days (sNIDs) in over 100 countries since 1988.
This older dating estimate can be attributed to the use of the oldest "leptodactylid" fossil Baurubatrachus pricei† (86 Myr, [ 50]) to calibrate the crown node of Nobleobatrachia.
However, demonstrating that an avian phenological trait is heritable and is under directional selection only suggests that there is potential for adaptive evolution, but is insufficient to conclude that an advance of the average population laying date or arrival date from migration can be attributed to evolutionary adaptation (e.g. Teplitsky et al. 2010).
If few poems can be dated accurately, still fewer can be attributed to particular poets.
The rise in location-based marketing through entertainment dates back to the early 1990's and can be attributed to an effort to keep mall shoppers from shifting to the Internet or other competing retail forms, like catalogs.
But Bruce E. Cain, the director of the Institute of Governmental Studies at the University of California, Berkeley, said no one has studied the low turnout numbers to determine if in fact they can be attributed to the March date.
Thirty-five documents survive from his bishopric, but few of them can be attributed to a specific date.
The contrast between this dating and that obtained from microsatellites [ 20] can be attributed to the well known effect of homoplasy of microsatellites, which leads to underestimation of separation times for long diverging populations [ 60].
13 Through integration of the various databases, a complex of factors can be attributed to each individual patient (date of birth, gender, any drug prescriptions, and any hospital stays).
Frank Zöllner, however, in the latest Leonardo monograph, speaks of "technical shortcomings, which one would not expect to find in panel paintings dating from Leonardo's maturity… only the original design can be attributed to Leonardo".
