function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Echternacht, Livia & Watanabe, Maurício Takashi Coutinho', 1],
    ['Giulietti, Ana Maria & Hensold, Nancy & Parra, Lara Regina', 2],
    ['Hensold, Nancy & Oliveira, Adriana Luiza R.', 1],
    ['Oliveira, Adriana & Bove, Claudia', 14],
    ['Thornhill, Robert & Krings, Alexander & Lindbo, David', 2],
    ['Trovó, Marcelo & Echternacht, Lívia', 15]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=35)',
    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);