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Table 1 Portal searches results

From: PaperBot: open-source web-based search and metadata organization of scientific literature

Portal Articles found by multiple portals Articles found only by a single portal
PubMed 82 29
PubMedCentral 540 1320
Google scholar 372 315
Nature 52 4
Wiley 226 186
ScienceDirect 82 87
SpringerLink 81 18
  1. Uniqueness and redundancy in over multiple portal searches