function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Acta Zoologica Academiae Scientiarum Hungaricae', 2],
    ['Anzeiger', 2],
    ['Biodiversity Data Journal', 1],
    ['Botanica Marina', 1],
    ['Cryptogamie, Algologie', 2],
    ['European Journal of Taxonomy', 22],
    ['Insecta Mundi', 3],
    ['Journal of Natural History', 17],
    ['Linzer biologische Beiträge', 2],
    ['Mémoires du Muséum national d\'Histoire naturelle', 2],
    ['Order out of Chaos. Linnaean Plant Types and their Types', 9],
    ['Phytotaxa', 6],
    ['Revue suisse de Zoologie', 5],
    ['Zoological Systematics', 3],
    ['Zootaxa', 17],
    ['Other (3)', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=97)',
    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);