function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Anselmini, Luiza Silva & Prando, Jádila Santos', 4],
    ['Ball, E. D.', 1],
    ['Carvalho, A. N.', 1],
    ['Carvalho, A. N. & Cavichioli, R. R.', 2],
    ['Carvalho, Adenomar N. & Cavichioli, Rodney R.', 3],
    ['Felix, Márcio & Mejdalani, Gabriel', 2],
    ['Felix, Márcio & Quintas, Victor & Prando, Jádila Santos', 2],
    ['Souza, Stephanie Pereira De & Takiya, Daniela Maeda', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=17)',
    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);