function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Goldenberg, R. & Gonella, P. M. & Meyer, F. S.', 4],
    ['Guimarães, Paulo José Fernandes & Michelangeli, Fabián A.', 2],
    ['Machado, Ana Isa Marquez Rocha & Romero, Rosana', 2],
    ['Maia, Valéria Cid & Mascarenhas, Bernardo', 5],
    ['Meyer, Fabrício Schmitz & Brotto, Marcelo Leandro', 2],
    ['Meyer, Fabrício Schmitz & Goldenberg, Renato', 2],
    ['Meyer, Fabrício Schmitz & Pacifico, Ricardo & Almeda, Frank', 1],
    ['Silva, Marcus Felippe Oliveira Da', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=20)',
    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);