function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Costa, Wilson J. E. M. & Bockmann, F. A.', 1],
    ['Costa, Wilson J. E. M. & Katz, Axel M. & Mattos, José L. O.', 2],
    ['Costa, Wilson J. E. M. & Lima, Sérgio M. Q.', 1],
    ['Langeani, Francisco', 1],
    ['Medeiros, Lucas Silva De & Moreira, Cristiano Rangel', 1],
    ['Wilson J. E. M. Costa & Sergio M. Q. Lima', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=7)',
    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);