function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bleeker, Pieter', 1],
    ['Boulenger, George Albert', 1],
    ['Kimura, Seishi', 1],
    ['Peters, Wilhelm Carl Hartwig', 1],
    ['Sauvage, H. E.', 2],
    ['Skelton, Paul H. & Swartz, Ernst R. & Vreven, Emmanuel J.', 1],
    ['Tchang, T. - L.', 1],
    ['Vreven, Emmanuel J. W. M. N. & Musschoot, Tobias & Snoeks, Jos', 3],
    ['van Hasselt, Johan Coenraad', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=12)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 9, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);