function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['European Journal of Taxonomy', 4],
    ['Journal of Natural History', 2],
    ['Kosugi Co., Ltd.', 1],
    ['Natuurkunde Tijdschrift voor Nederlandsche-Indië', 1],
    ['Nouveaux Mémoires de la Société Impériale des Naturalistes de Moscou', 1],
    ['Novi Commentarii Academiae Scientiarum Instituti Bononiensis', 1],
    ['Report of the Fisheries and Marine Biological Survey, Union of South Africa', 1],
    ['Vestnik Zoologii', 2],
    ['Zootaxa', 6]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=19)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 9, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);