function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['DISNEY, R. Henry L.', 2],
    ['DISNEY, R. Henry L. & WINQVIST, Kaj', 3],
    ['García-Romera, Carlos & Barrientos, Jose Antonio', 1],
    ['Henry, R. & Bøggild, Esben', 2],
    ['Lengyel, Gábor Dániel', 1],
    ['Mostovski, Mike B.', 1],
    ['O’Hara, James E. & Cerretti, Pierfilippo & Pape, Thomas', 1],
    ['Perkovsky, E. E. & Mostovski, M. B. & Henderickx, H.', 1],
    ['Sforzi, Alessandra & Sommaggio, Daniele', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=13)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 9, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);