function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Adansonia', 173],
    ['Biodiversity Data Journal', 21],
    ['Blumea - Biodiversity, Evolution and Biogeography of Plants', 49],
    ['Botanische Jahrbücher fur Systematik, Pflanzengeschichte und Pflanzengeographie.', 22],
    ['European Journal of Taxonomy', 124],
    ['Fossil Imprint', 8],
    ['Gardens\' Bulletin (Singapore)', 28],
    ['Insecta Mundi', 8],
    ['Journal of the Arnold Arboretum', 15],
    ['Kew Bulletin', 8],
    ['Laurentius Salvius', 17],
    ['Order out of Chaos. Linnaean Plant Types and their Types', 25],
    ['PhytoKeys', 497],
    ['Phytotaxa', 132],
    ['Zootaxa', 23],
    ['Other (22)', 44]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=1194)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);