function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Berning, Björn & Ostrovsky, Andrew N.', 1],
    ['Berning, Björn & Tilbrook, Kevin J. & Rosso, Antonietta', 1],
    ['Denisenko, Nina V.', 5],
    ['Gordon, Dennis P. & Voje, Kjetil L. & Taylor, Paul D.', 8],
    ['Pacaud, Jean-Michel', 1],
    ['Ramalho, Laís V. & López-Fé, Carlos M. & Rueda, José Luis', 3],
    ['Ramalho, Laís V. & Taylor, Paul D. & Moraes, Fernando Coreixas', 2],
    ['Reverter-Gil, Oscar & Souto, Javier & Novosel, Maja', 9],
    ['Sebastian, Pascal & Cumming, Robyn L.', 4],
    ['Souto, J. & Reverter-Gil, O.', 2],
    ['Winston, Judith E. & Vieira, Leandro M.', 2],
    ['Yang, Ho Jin & Seo, Ji Eun & Min, Bum Sik', 9]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=47)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 12, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);