function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Adalsteinsson, Solny A. & Branch, William R. & Trape, Sébastien', 1],
    ['Francisco, Bárbara Cristina S. & Pinto, Roberta R.', 1],
    ['Guedes, Thaís B. & Nogueira, Cristiano & Marques, Otavio A. V.', 2],
    ['Koch, Claudia & Cruz, Roy Santa & Cárdenas, Heidy', 2],
    ['Koch, Claudia & Venegas, Pablo J. & Böhme, Wolfgang', 3],
    ['Nogueira, Cristiano C. & Argôlo, Antonio J. S.', 7],
    ['Pinto, Roberta Richard & Passos, Paulo', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=19)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 7, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);