function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bertaco, Vinicius A. & Azevedo, Marco A.', 1],
    ['Evermann, Barton Warren & Kendall, W. C.', 1],
    ['Malabarba, Luiz R. & Dyer, Brian S.', 2],
    ['Soricetti, Mariano & Morawicki, Santiago', 2],
    ['Wingert, Juliana M. & Ferrer, Juliano & Malabarba, Luiz R.', 2],
    ['de Buen, F.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=9)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 6, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);