function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Costa, Wilson J. E. M. & Feltrin, Caio R. M. & Katz, Axel M.', 2],
    ['Landim, M. I. & Costa, Wilson J. E. M.', 1],
    ['Leandro Villa-Verde & Wilson J. E. M. Costa', 2],
    ['Villa-Verde, Leandro & Lazzarotto, Henrique & Lima, Sergio M. Q.', 1],
    ['Wolmar Benjamin Wosiacki', 1],
    ['de Pinna, M. C. C.', 2]
  ]);
  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);