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Table 2 Quantifying and categorizing of scientific publications regarding 30 medicinal plants during bibliographic literature research process

From: Medicinal plants – prophylactic and therapeutic options for gastrointestinal and respiratory diseases in calves and piglets? A systematic review

Plant species Common name All references imported from WoS1 and PM2after removal of duplicates After keyword search in titles and abstracts with endnote Pharmacognostic studies Reviews After checking of relevance, regarded for the assessment of plant species Clinical studies In vivo studies In vitro and ex vivo studies
Achillea millefolium L. yarrow 345 157 14 2 15 2 3 10
Agrimonia eupatoria L. agrimony 73 37 10 0 2 1 0 1
Allium sativum L. garlic 1149 630 24 14 31 9 5 17
Althaea officinalis L. marshmellow 62 29 6 1 6 0 4 2
Camellia sinensis (L). KUNTZE green tea 2052 804 53 21 32 4 6 22
Carum carvi L. caraway 191 95 28 6 5 0 1 4
Cetraria islandica (L.) ACH. Icelandic moss 118 46 8 0 4 1 1 2
Echinacea purpurea (L.) MOENCH purple coneflower 869 364 45 18 48 14 8 26
Foeniculum vulgare (L.) MILL. fennel 825 308 46 6 18 1 4 13
Glycyrrhiza glabra L. liquorice 597 252 43 8 26 3 7 16
Linum usitatissimum L. linseed 762 227 12 5 7 3 3 1
Malva sylvestris L. wild mallow 243 50 2 2 4 0 3 1
Matricaria recutita L. camomile 908 305 43 7 22 1 7 14
Mentha x piperita L. peppermint 1331 425 35 23 21 8 0 13
Origanum vulgare L. oregano 904 526 42 0 36 10 4 22
Picea abies (L.) H.KARST. norway spruce 1031 153 0 0 1 0 0 1
Pimpinella anisum L. anis 453 147 12 2 12 2 0 10
Plantago lanceolata L. english plantain 532 136 7 2 6 1 0 5
Potentilla erecta (L.) RAEUSCH. tormentil 49 15 3 2 3 2 0 1
Primula veris L. cowslip 106 23 2 0 1 0 0 1
Quercus robur L. english oak 1210 165 7 0 0 0 0 0
Rubus fruticosus L. blackberry 583 172 34 0 6 0 1 5
Rumex ssp. L. dock 939 208 15 2 11 0 4 7
Salix ssp. L. willow 915 171 20 13 6 0 1 5
Salvia officinalis L. sage 902 372 67 5 20 7 7 6
Sambucus nigra L. elderberry 891 169 19 4 7 1 2 4
Thymus vulgaris L. thyme 831 372 52 3 36 6 2 28
Tussilago farfara L. coltsfoot 101 36 14 0 4 0 1 3
Urtica dioica L. stinging nettle 760 251 16 10 20 1 6 13
Vaccinium myrtillus L. blueberry 632 155 25 7 8 0 4 4
suma   20364 6800 704 164 418 77 84 257
  1. adue to the definition of reference (trial x plant species x indication) the sum may contain some trials more than one time; 1WoS = Web of Science [50]; 2PM = PubMed [49]