function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Al-Khazali, Azhar Mohammed & Kachel, Hamid Saeid', 2],
    ['Biswas, B. & Majumder, S. C.', 2],
    ['Dean, David Allen', 1],
    ['Dmitri V. Logunov', 1],
    ['Hurni-Cranston, Tiziano & Hill, David E.', 2],
    ['Jäger, Peter', 2],
    ['Norma-Rashid, Y. & Li, Daiqin', 1],
    ['Pupin, Giovanni B. & Brescovit, Antonio D.', 1],
    ['Richardson, Barry J.', 1],
    ['Rollard, Christine & Wesołowska, Wanda', 1],
    ['Sherwood, Danniella & Nada, MarÍ ́ a Florencia & Pet, Brogan L.', 1],
    ['Sherwood, Danniella & Sharp, Adam', 1],
    ['Tang, Jiaxin & Liang, Wei & Shi, Haitao & Gao, Caixia', 1],
    ['Wesolowska, W. & van Harten, A.', 2],
    ['Wesołowska, Wanda & Russell-Smith, Anthony', 1],
    ['Other (1)', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=21)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);