function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Biodiversity Data Journal', 31],
    ['Botanica Marina', 60],
    ['Check List', 9],
    ['Cryptogamie, Algologie', 85],
    ['European Journal of Taxonomy', 20],
    ['Havniae & Lipsiae', 4],
    ['Iheringia, Série Botânica', 8],
    ['Italian Botanist', 9],
    ['Journal of Natural History', 19],
    ['Order out of Chaos. Linnaean Plant Types and their Types', 6],
    ['PhytoKeys', 89],
    ['Phytochemistry', 4],
    ['Phytotaxa', 373],
    ['Revue suisse de Zoologie', 6],
    ['Zootaxa', 63],
    ['Other (18)', 26]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=812)',
    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);