function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Acarologia', 1],
    ['Acta Entomologica Musei Nationalis Pragae', 1],
    ['Acta Zoologica Academiae Scientiarum Hungaricae', 1],
    ['Biodiversity Data Journal', 2],
    ['Botanica Marina', 2],
    ['Cryptogamie, Algologie', 9],
    ['Italian Botanist', 9],
    ['Journal of Natural History', 18],
    ['Neotropical Ichthyology', 3],
    ['Order out of Chaos. Linnaean Plant Types and their Types', 45],
    ['Phytotaxa', 28],
    ['Revue suisse de Zoologie', 6],
    ['Rudolfinum – Jahrbuch des Landesmuseums für Kärnten', 2],
    ['Zoosystema', 4],
    ['Zootaxa', 50],
    ['Other (5)', 5]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=186)',
    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);