function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Baer, J. G.', 1],
    ['Braun, M.', 1],
    ['Fugassa, Martin H.', 1],
    ['Lunaschi, Lía I. & Drago, Fabiana B.', 1],
    ['Macy, Ralph W.', 2],
    ['Santos, Cláudia Portes & Gibson, David I.', 1],
    ['Wang, P. - q.', 3],
    ['Zhang, T. - f.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=11)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);