function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Annales de la Societe Entomologique de Belgique', 1],
    ['Annals of the Entomological Society of America', 4],
    ['Berliner Entomologische Zeitschrift', 2],
    ['Biodiversity Data Journal', 1],
    ['Calodema Supplementary Paper', 1],
    ['Caucasian Entomological Bulletin', 1],
    ['Entomologische Mitteilungen', 1],
    ['Insect Systematics and Diversity', 24],
    ['Journal of the Royal Society of Western Australia', 2],
    ['ZooKeys', 2],
    ['Zoologische Jahrbu ̈ cher', 1],
    ['Zootaxa', 10]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=50)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 12, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);