function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Enderlein, Günther', 2],
    ['Matsunaga, Janis N. & Howarth, Francis G.', 1],
    ['Mockford, Edward L.', 1],
    ['Neto, Alberto Moreira da Silva & Aldrete, Alfonso Neri García', 1],
    ['Perez-Gelabert, Daniel E.', 1],
    ['Schmidt, Evan R. & New, Tim R.', 2],
    ['Silva-Neto, Alberto Moreira da & Aldrete, Alfonso Neri García', 1],
    ['Smithers, C. N.', 2],
    ['Smithers, Courtenay Neville', 2],
    ['Thornton, Ian W. B. & New, Tim R.', 11],
    ['Thornton, Ian W. B. & Smithers, Courtenay Neville', 5],
    ['Thornton, Ian W. B. & Wong, Siu-Kai', 2],
    ['Tillyard, Robin John', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=34)',
    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);