function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ballesteros, Alfonso & Francke, Oscar F.', 1],
    ['Banks, Nathan', 3],
    ['Brookhart, Jack O. & Muma, Martin H.', 1],
    ['Chamberlin, Ralph V.', 1],
    ['Cushing, Paula E. & Channiago, Felix & Brookhart, Jack O.', 17],
    ['Garcia, Erika L. & Hansen, Quincy G. & Cushing, Paula E.', 1],
    ['Harms, Danilo & Dupérré, Nadine', 5],
    ['Harvey, Mark S.', 1],
    ['Hirst, Stanley', 1],
    ['Kraepelin, Karl', 6],
    ['Muma, Martin H.', 2],
    ['Putnam, J. Duncan', 5],
    ['Simon, Eugène', 4]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=48)',
    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);