function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Draper, Isabel & Mazimpaka, Vicente & Hedenäs, Lars', 1],
    ['Guerra, Juan & Ríos, Diana & Gallego, María Teresa', 2],
    ['Ivanets, Viktoria & Wierzgoń, Mariusz & Yevchun, Hanna', 1],
    ['Osman, Imen Ben & Hugonnot, Vincent & Muller, Serge D.', 2],
    ['Pantović, Jovana & Veljić, Milan & Grdović, Svetlana', 3],
    ['Pickard-Cambridge, Octavius', 1],
    ['Pioli, Achille', 2],
    ['Price, Michelle J.', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=14)',
    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);