function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Acta Entomologica Musei Nationalis Pragae', 2],
    ['BMC Evolutionary Biology', 1],
    ['Beiträge Zur Entomologie = Contributions to Entomology', 2],
    ['Biodiversity Data Journal', 15],
    ['Deutsche Entomologische Zeitschrift', 1],
    ['Far Eastern Entomologist', 20],
    ['Fragmenta Faunistica', 5],
    ['Insect Systematics and Diversity', 2],
    ['Insecta Mundi', 1],
    ['Linzer biologische Beiträge', 63],
    ['New Zealand entomologist', 1],
    ['Nova Acta Científica Compostelana (Bioloxía)', 2],
    ['Polskie Pismo Entomologiczne [Polish Journal of Entomology]', 1],
    ['ZooKeys', 18],
    ['Zootaxa', 59]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=193)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 15, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);