function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Kallal, Robert J. & Hormiga, Gustavo', 2],
    ['Massanti, Thiago B. & Cavichioli, Rodney R. & Ott, Ricardo', 5],
    ['Nogueira, André A. & Pena-Barbosa, João P. P.', 14],
    ['Salgueiro-Sepúlveda, F. Javier & Álvarez-Padilla, Fernando', 9],
    ['Simó, Miguel & Álvarez, Luis & Laborda, Álvaro', 2],
    ['Álvarez-Padilla, Fernando & Hormiga, Gustavo', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=33)',
    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);