function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Gill, T. N.', 1],
    ['Géry, J. & Le Bail, P. - Y. & Keith, P.', 1],
    ['Hess, Hans Ernst & Landolt, Elias & Hirzel, Rosmarie', 2],
    ['Laan, Richard Van Der & Eschmeyer, William N. & Fricke, Ronald', 2],
    ['Luque, José L. & Tavares, Luiz E. R.', 1],
    ['Mille, Christian & Henderson, Rosa C. & Cazères, Sylvie', 1],
    ['Ota, Renata Rúbia & Deprá, Gabriel de Carvalho', 1],
    ['Reinhardt, J. T.', 1],
    ['Soares, Geusivam B. & Magalhães, Keila X. & Silva, Ana Carolina', 5],
    ['Spix, J. B. von & Agassiz, Jean Louis Rodolphe', 1],
    ['W. Peters', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=18)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 11, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);