function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Adansonia', 946],
    ['Biodiversity Data Journal', 2217],
    ['Birkhaeuser Verlag', 822],
    ['Botanische Jahrbücher fur Systematik, Pflanzengeschichte und Pflanzengeographie.', 259],
    ['Candollea', 387],
    ['Check List', 307],
    ['Denkschriften der Schweizerischen Naturforschenden Gesellschaft', 726],
    ['Flora Helvetica', 709],
    ['Info Flora Schweiz', 1010],
    ['Laurentius Salvius', 509],
    ['Linzer biologische Beiträge', 373],
    ['Order out of Chaos. Linnaean Plant Types and their Types', 1218],
    ['PhytoKeys', 1164],
    ['Phytotaxa', 5684],
    ['Zootaxa', 534],
    ['Other (188)', 2923]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=19788)',
    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);