function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Calcinai, Barbara & Bastari, Azzurra & Bavestrello, Giorgio', 2],
    ['Calcinai, Barbara & Belfiore, Giuseppe & Pica, Daniela', 2],
    ['Campos, Maurício & Mothes, Beatriz & Eckert, Rafael', 1],
    ['Helmy, Tamer & Van, Rob W. M. & Soest', 4],
    ['Hooper, John N. A. & Van, Rob W. M. & Soest', 2],
    ['Rützler, Klaus & Piantoni, Carla & Van, Rob W. M.', 1],
    ['Santos, George Garcia & Docio, Loyana & Pinheiro, Ulisses', 2],
    ['Ugalde, Diana & Fernandez, Julio C. C. & Gómez, Patricia', 2],
    ['Ugalde, Diana & Gómez, Patricia & Simões, Nuno', 2],
    ['Van, Rob W. M.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=19)',
    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);