function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Boulenger, George Albert', 3],
    ['Moelants, Tuur & Zebe, Victorine Mbadu & Snoeks, Jos', 3],
    ['Nichols, J. T. & Griscom, L.', 1],
    ['Pellegrin, J.', 2],
    ['Peters, Wilhelm Carl Hartwig', 3],
    ['Rivière, E.', 1],
    ['Schmidt, Ray C. & Knobloch, Elise C. & Barrientos, Christian', 2],
    ['Sidlauskas, Brian L. & Vari, Richard P.', 1],
    ['Steindachner, F.', 2],
    ['Worthington, E. B. & Ricardo, C. K.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=19)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 10, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);