function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bleeker, Pieter', 1],
    ['Edwards, A. J. & Gill, A. C. & Abohweyere, P. O.', 4],
    ['Ho, Hsuan-Ching & Shao, Kwang-Tsao', 1],
    ['Jordan, David Starr & Richardson, R. E.', 1],
    ['Jordan, David Starr & Snyder, John Otterbein', 1],
    ['Peter Wirtz & Carlos Eduardo L. Ferreira & Sergio R. Floeter', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=10)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 6, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);