function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Connors, Matthew G.', 2],
    ['Holwell, Gregory I.', 5],
    ['Holwell, Gregory I. & Ginn, Scott G. & Herberstein, Marie E.', 6],
    ['Moulin, Nicolas & Decaens, Thibaud & Annoyer, Philippe', 4],
    ['Pfäuti, Patrice & Hollier, John', 1],
    ['Rivera, Julio', 1],
    ['Rivera, Julio & Vergara-Cobián, Clorinda', 9],
    ['Roy R.', 2],
    ['Schwarz, Christian J. & Ehrmann, Reinhard', 1],
    ['Schwarz, Christian J. & Ehrmann, Reinhard & Stiewe, Martin B. D.', 7],
    ['Schwarz, Christian J. & Konopik, Oliver', 2],
    ['Svenson, Gavin J.', 38],
    ['Tedrow, Riley & Nathan, Kabanguka & Richard, Nasasira', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=79)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 13, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);