function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Acta Entomologica Musei Nationalis Pragae', 2],
    ['Acta Zoologica Academiae Scientiarum Hungaricae', 2],
    ['Biodiversity Data Journal', 5],
    ['Botanica Marina', 10],
    ['Cryptogamie, Algologie', 64],
    ['European Journal of Taxonomy', 29],
    ['Insecta Mundi', 3],
    ['Italian Botanist', 4],
    ['Journal of Natural History', 58],
    ['Linzer biologische Beiträge', 8],
    ['Order out of Chaos. Linnaean Plant Types and their Types', 36],
    ['Phytotaxa', 25],
    ['Revue suisse de Zoologie', 5],
    ['Zoological Systematics', 5],
    ['Zootaxa', 29],
    ['Other (12)', 15]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=300)',
    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);