function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Amato, J. F. R', 3],
    ['Fischthal, Jacob H.', 1],
    ['Gupta, N. K.', 1],
    ['Li, Qin-kui & Qiu, Zhaozhi & Zhang, Run-sheng', 1],
    ['Lopes, Daniela A. & Mainenti, Adriana & Knoff, Marcelo', 3],
    ['Lunaschi, Lia I. & Álvarez, Victor Hugo Merlo', 1],
    ['Manter, Harold W.', 2],
    ['Martorelli, Sergio Roberto', 1],
    ['Read, Clark P.', 1],
    ['Travassos, L. & Bührnheim, P. F. & Teixeira de Freitas, J. F.', 1],
    ['von Wicklen, J. H.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=16)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 11, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);