function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Cocca, Walter & Andreone, Franco & Belluardo, Francesco', 1],
    ['Crottini, Angelica & Glaw, Frank & Casiraghi, Maurizio', 1],
    ['Hutter, Carl R. & Andriampenomanana, Zo F.', 1],
    ['Randrianiaina, Roger Daniel & Wollenberg, Katharina C.', 1],
    ['Randrianiaina, Roger-Daniel & Glaw, Frank & Thomas, Meike', 2],
    ['Scherz, Mark D. & Hawlitschek, Oliver & Razafindraibe, Jary H.', 1],
    ['Scherz, Mark D. & Rakotoarison, Andolalao', 2],
    ['Scherz, Mark D. & Razafindraibe, Jary H.', 1],
    ['Scherz, Mark D. & Rudolph, Janina & Rakotondratsima, Marius', 1],
    ['Scherz, Mark D. & Vences, Miguel & Borrell, James', 1],
    ['Vences, Miguel & Koehler, Joern & Crottini, Angelica', 9],
    ['Vieites, David R. & Wollenberg, Katharina C. & Vences, Miguel', 1],
    ['Wollenberg, Katharina C. & Glaw, Frank & Vences, Miguel', 4]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=26)',
    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);