function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Britto, M. R.', 2],
    ['Britto, Marcelo R. & Lima, Flávio C. T.', 1],
    ['De Oliveira, Rianne C. & Ota, Renata R. & Deprá, Gabriel C.', 3],
    ['Leão, Manuela D. V. & Britto, Marcelo R. & Wosiacki, Wolmar B.', 1],
    ['Lima, F. C. T. & Britto, M. R.', 1],
    ['Miranda-Ribeiro, P. de', 1],
    ['Nijssen, H. & Isbrücker, I. J. H.', 8],
    ['Oliveira, Lívia M. A. & Zanata, Angela M. & Tencatt, Luiz F. C.', 1],
    ['Published, First', 1],
    ['Secutti, Sandro & Reis, Roberto E. & Trajano, Eleonora', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=20)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 10, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);