function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bosselaers, Mark & Collareta, Alberto', 1],
    ['Chan, Benny K. K. & Dreyer, Niklas & Gale, Andy S.', 1],
    ['Collareta, Alberto & Marean, Curtis W. & Jerardino, Antonieta', 2],
    ['Darwin, Charles Robert', 1],
    ['Gray, John Edward', 2],
    ['Pilsbry, Henry A. & Olson, A. A.', 1],
    ['Ranzani, C.', 1],
    ['Ross, Arnold & Frick, Michael G.', 5],
    ['Say, Thomas', 1],
    ['Stebbing, Thomas R. R.', 1],
    ['Weisbord, Norman', 1],
    ['Young, Paulo S.', 2],
    ['Zullo, V. A.', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=21)',
    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);